i can't understand decorator

[contro opinion]

>>> def deco(func):
...      def kdeco():
...          print("before myfunc() called.")
...          func()
...          print("  after myfunc() called.")
...      return kdeco
...
>>> @deco
... def myfunc():
...      print(" myfunc() called.")
...
>>> myfunc()
before myfunc() called.
 myfunc() called.
  after myfunc() called.
>>> deco(myfunc)()
before myfunc() called.
before myfunc() called.
 myfunc() called.
  after myfunc() called.
  after myfunc() called.
1.
why there are two lines :before myfunc() called.and tow lines :after
myfunc() called. in the output?
2.why the result is not
before myfunc() called.
 myfunc() called.
  after myfunc() called.
before myfunc() called.
 myfunc() called.
  after myfunc() called.
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